import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/hello")
public class HelloServlet extends HttpServlet {
//    @Override
//    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//        //super.doGet(req, resp);
//        //这是在服务器的控制中，打印了字符串。（服务器看到了，客户端看不到）
//        System.out.println("hello world");
//        //这个是给 resp 的 body 写入 hello world 字符串，这个内容就会被 HTTP 响应返回给浏览器，显示到浏览器页面上
//        resp.getWriter().write("hello world");
//    }


    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("doGet");
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("doPost");
    }

    @Override
    protected void doPut(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("doPut");
    }

    @Override
    protected void doDelete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getWriter().write("doDelete");
    }
}
